Casing for an electronic unit



FIG. 1 is a front, right, top perspective view of a casing for an electronic unit showing our new design;

FIG. 2 is a back, left, bottom perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a front elevational view thereof; and,

FIG. 8 is a rear elevational view thereof. 

The ornamental design for a casing for an electronic unit, as shown and described. 